6.

To clarify: Benjen Stark (who you probably don't remember all that well since he hasn't appeared since season 1, but who is/was a member of the Night's Watch AND Ned Stark's brother) was the person who saved Bran and Meera from the wights. And his new state of being ("Almost-An-Ice-Zombie") bears a more-than-striking resemblance to a character in the books called "Coldhands" (whose true identity has still not been revealed). The long-standing fan theory was that Coldhands was Benjen Stark, but author George R.R. Martin shot down that theory to his own editor.